Stop for phonographs



H. W. TROEGER. STOP FOR PHOIIIOGBAPHS. APPLICATION FILED JUNE I7. 1919. R'EIIEWED IAN. 10,1922. 1,426,125, Patented Aug. 15, 1922'.

3 SHEETSSHEET l.

awuemroz Herman Walter Trae gcr amine/mas H. w. TROEGER.

STOP FOR PHONOGRAPHS. APPLICATION FILED JUNE 17, I919- RENEWED JAN. 10, 19 22. 1,426 ,125 V Patented Aug. 15, 1922.

3 SHEETSSHEET 2.

' v 4 awvevwfoz Herman Walter Troe ger 2m14moaea H. W. TROEGER.

STOP For: PHONOQRAPHS. APPLICATION FILED JUNE 17. I919- RENEWED JAN- 10- I 2 Patented Aug. 15, 1922.

3 SHEETSSHEET 3- F/IIIIIIIIII/l I w lie rman. Walter Troeger N l T HERMAN WALTER TROEGER, OF DETROIT, MICHIGAN.

STOP: FOB PHONOGRAPHS.

Specification of Letters iatnt.

Application filed June 17, 1919, SerialNo. 304,855. Renewed January 10, 1922. Serial no; 528,135.

To all whom it may concern:

Be it known that I, HERMAN l/VALTER Tnoizonn, a citizen of the United States, re

and ate of Michigan, have invented new and useful Improvements in Stops for Phoe I v nographs', of which the following is a speci fication. j

This invention relates to automatic stops for phonographs and the principal object of the invention is 'to' provide electrically actuated means for stopping the phonograph as soon as the needle of the reproducer reaches the end of the record.

Another object of the invention is to connect the actuating means with the usual stop lever of a phonograph and to vmake such means adjustable so that the invention may be applied to different styles of phonographs.

The invention also consists in certain other features of construction and in the combination and arrangement ofthe several parts, to be hereinafter fully described, illustrated in the accompanying drawings and specifically pointed out in the appended claims.

In describing my invention in detail, reference will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout'the several views, and in which Figure 1 is a plan view of a phonograph equipped with my invention;

Fig. 2 is a section on line 2-2 of Fig. 1; Fig. 3 is'a side View of the magnetic actu ating means;

Fig. 4 is an enlarged section on line 4.-4; of Fig. 1;

Fig. 5 is a detailed view of the circuit breaker;

Fi 6 is a detailed view showing how the 'circult is broken;

Fig. 7 is a view showing how the brush is carried by the reproducer;

Fig. 8 is'a detailed sectional view through the center of the record showing the manner of attaching the tin-foil to the edge of'the opening in said record;

Fig. 9 is a view of an ad ustable bridge piece for carrying the current from the brush to the central revolving post;

' Fig. 10 is a plan view of a modification; Fig. 11 is a sectional view of this modification" Fig. 12 is a detailed view thereof.

In these views lindicates a portion ofthe phonograph 2 the central revolving post 1 thereof, 3 the record located on the turntable sldmg at Detroit, in the county of Wayne of the phonograph and/i indicates the lever for stopping the machine.

'lnfcarryln out my invention'I provide a conducting e ement 5 which reaches from the end of the groove in the record to the engage the walls of the opening, as shown at 8 Fig. 8. In this way whenthe record is placed on the post the tin foil will make firm contact-with the post and thus insure the passage of the current from the foil to the post. 7

I sometimes find it-desirable to form this conducting element from a strip of metal 9,

as shown in Fig. 9, with its broad head 6 made separate and adjustably connected with the strip, as shown. The strip has points 9'j punched therefrom which are adapted to becemented to the record to hold the stri in position, thereon. The head 6 allows t e element to be adjusted to suit different records.

'However, I do not Wish to be limited to the form of this element as any conducting medium may be used'to bridge the space be tween the end of the groove and the post.

A brush '10 is suitably connected'with a part of the reproducer so as to engage with the head-6 of the conducting element when the needle of the reproducer reaches the end of the record. As shown in Fig. 7, the

brush is carried by a spring plunger 11 which is carried by anarm 12, connected to the needle socket of the reproducer. This brush is connected with the circuit wire'13 which leads to the battery 14. The brush is so arranged that it will engage the head 6 just as the needle reaches the end of the record.

, The means for shifting thestop lever into its stopping position consists of a frame 15 which is adapted to be placed on the phonograph in a position so it willengage the said stop lever 4:. This frame carries 'a'pair Patented Au 15, 1922.

of guide rods 16 on which the lever engaging member 17 is arranged to slide. Coiled springs 18 on said rods tend to hold the said member in a position with thelever in stopping position. This member is provided with a'forked end 17, which receives the end of the lever. The upper part of the member is'al'so provided with a finger-engaging part 19 so that said member may be moved by the fingers to throw the stopping lever in inoperative position. This movement of the member will compress the springs 18. The member is held in this position with the springs compressed by means of a lever 20 pivotally mounted on a screw threaded rod 21 carried by the frame. This lever is provided with a finger-engaging end. 22 and the other end is provided with a wedge-shaped projection 23 which is adapted to engage with v a" slot 24 formed in a projecting part 25, of

the member 17. Thus when the projection 23 is engaging said slot, the said member is held with the lever in inoperative position and the springs compressed. The screw shaft 21 has one end extended and this end receives a thumb nut 26 for turning the said shaft to adjust the position of the lever 20 in order to make the device applicable to different styles of machines. The lever 20 carries an armature 27 which is of suflicient length to extend across a pair of electromagnets 28 carried by the frame. The armature is guided in its movement by the rods 29 carried by the frame and on which are located springs 30 which tend to hold the armature spaced from. the electromagnets. When the electromagnets are energized, the armature will be attracted so that the lever 20 is tilted and this action withdraws the projection 23 from, the slot 24 so that. the

springs 18 will project the member 17. tov

the other end of the frame-and thus move the stop lever into position for stopping the phonograph.

The current passes from one terminal of thebattery lt, through the wire 13, the brush 10, through the element 5 tothe post 2, through the parts of the motor, thestop lever and the frame 15 to the coilsand from the coils to the battery. Where the stop lever is not connected with the motor the frame may be connectedwith said motor in any desired manner.

In order to prevent the battery. from being exhausted if the brush should remain in contact with the element 5, I provide means for breaking the circuit when the member 17 is in position with the stop lever in inoperative position. These means consist of an insulated block 3-1 in which is located a spring strip 32,.0ne endof which is connected with the circuit while its other end bears against a terminal 33 which is connected withthe wire leadingfrom the electromagnets. This strip is in the path of a screw threaded projection 34 carried by the member 17 so that as the member reaches the end of its movement, the projection 34 will strike the spring strip 32 and force the same away from the terminal 33 and thus break the circuit.

It ,will thus be seen that as the needle reaches the end of the groove in the record, the brush coming in contact with the head 6 of the element 5 will complete the circuit to the electromagnets so as to cause them to attract the armature and thus release the member 17 from the lever 20. The springs 18 will then project the member and the lever to the other end of the frame so as to stop the phonograph and at the sametime break the circuit, if the same has not already been broken by the momentum of the ma chine carrying the brush off the head. It

will be seen that the lever 20 may be operated at any time to release the member 17 by grasping the member 22 with the fingers.

In the modification shown in Figs. 10, 11 and 12,1 provide a cam member 34 for engaging the turn table of the phonograph to stop the movement of the same. This member is carried by a shaft 35 rotatably mounted in the supporting frame and provided with a pinion 36 on its lower end. This pinion engages a rack provided on the bar 37, slidably mounted in the frame and' normally held in its forward. position by a spring 38. This bar is held in its retracted position, against the tension of the spring, by a,project'ion;39 engaging a: notch in said bar, said projection being carried by the' armature 4C0 slidably connected with the shaft 41. This armature is actuatedby the magnets 42 as before described,. and the armature may be raised to release. the rack bar by hand by the finger piece 43. When the armature-is raisedeither by hand or by the closing of the circuit asdescribed in the first modification, the projection will release the bar to permit the spring. to move'it forward, thus causing the engagement of the rack with the pinion to rotate the shaft and thus move the cam member into engagement with the turn table. and thus stop the-same. The parts are set by means of the thumb nut lton the shaft 35. I alsov provide. means for breaking the circuit as. soonas the armature is raised by the magnets, "such'means consisting of a spring plate 15 secured to one of the terminals andv adapted to be engaged by the end of the rack bar. 37, when the same is in retracted position, andpushed against the plate 46- connected with the other terminal- It isthoughtzfrom-the foregoing description that'the advantages and novel features of my invention will be readily apparent...

I desire itto be understood thatI make changes in the construction and in the combination and arrangement of the several parts, provided that such changes fall within the scope of the appended claims.

What I claim is 1. In combination With a phonograph, electrically operated means for stopping the same, such means including a braking member, spring means for holding said member in braking position, an armature carrying member for holding the member out of braking position a shaft carrying said armature carrying member, a hand engaging part connected with said shaft for releasing the armature carrying member manually, a magnet for releasing the armature carrying member electrically, a circuit including said magconnected with the cam member for rotating,

the same, spring means for moving said sliding member, magnetic means for holding the sliding member in retracted position, a circuit including said magnetic means and means for completing the circuit when the reproducer reaches the end of the record.

In testimony whereof I afiix my signature.

HERMAN WALTER TROEGER. 

